Class / Patent application number | Description | Number of patent applications / Date published |
464180000 | Particular vibration dampening or balancing structure | 44 |
20080293503 | MECHANICAL TRANSMISSION SYSTEM WITH A MAGNETIC DAMPER FOR A ROTORCRAFT - The invention relates to a rotorcraft transmission system that comprises both a transmission shaft ( | 11-27-2008 |
20080293504 | Shaft Assembly - A shaft assembly | 11-27-2008 |
20080312001 | Rotation Shaft Having Function of Anti-Vibrating - The present invention presents to a rotation shaft having function of anti-vibrating, comprises a retaining member having a sleeve, an shaft hole is axially formed on the sleeve, a mounting slot is radially extended from the shaft hole, the opening end of the shaft hole is adjacently connected to a concave positioning slot with a concave shape; an inner shaft bushing having at least one hollow clamping ring, a rack sheet is radially extended from one end of the clamping ring, and an opening is formed by the other end of the clamping ring and the rack sheet, the clamping ring and the rack sheet are respectively connected to the shaft hole and the mounting slot; an end sealing sheet, a mounting sheet is radially connected to a ring-shaped sheet of the end dealing sheet for being retained in the opening end of the shaft hole and the concave positioning slot the ring-shaped sheet is axially provided with a through hole located at the opening end of the shaft hole and communicating with the clamping ring; a mobile member, a shaft rod is axially extended from the mobile member and an oil sealing ring having an outer diameter larger than that of the shaft rod is protrudingly provided at the rear portion of the shaft rod, the shaft rod passes through the through hole and is covered by the clamping ring, and the outer diameter of the oil sealing ring is slightly smaller than the inner diameter of the through hole, so the oil sealing ring is provided on the through hole with a non-interfering fashion. | 12-18-2008 |
20090005183 | DAMPING DEVICE FOR A SHAFT OF A TURBOMACHINE - The present invention relates to a hollow shaft of a turbomachine comprising a cylindrical wall with an inner surface portion and at one end a member for attachment to a rotor disk of the turbomachine. The shaft also comprises a damping device wherein at least one vibration-damping laminate is attached to said inner surface portion, the laminate comprising at least one layer of viscoelastic material in contact with said surface portion and a counterlayer of rigid material. | 01-01-2009 |
20090048031 | Heat-Resistant Drive Shaft Damper Having Improved Dampening Performance - The invention is a heat-resistant drive shaft damper adapted to be inserted into a hollow automotive drive shaft. The damper with improved heat-resistant and NVH-reduction properties includes a retaining member that extends above the damper's outside surface and possesses a maximum operating temperature of 175° C. or higher. The invention further relates to a method of forming such a damper. | 02-19-2009 |
20090062023 | Propeller Shaft - In the case that a paper damper comes into contact with a dynamic damper, an outer paper portion of the paper damper first comes into contact with an outer ring member of a dynamic damper. At this time, the outer paper portion and an inner paper portion of the paper damper do not come into contact with an inner weight of the dynamic damper. | 03-05-2009 |
20090163284 | Developments in or relating to the balancing of a rotating assembly - A rotating arrangement comprising a rotating assembly mounted on an associated bearing defining a geometric axis of rotation for the rotating assembly, the rotating assembly comprising:
| 06-25-2009 |
20090197690 | Damped Axle Shaft - An axle shaft which is inherently damped very near the source of the oscillation, via inner and outer axle components with a damping ring that couples between them, wherein the inner component which serves as the axle shaft, has a torsional stiffness different from (i.e., less than) that of the outer component which serves as a concentrically disposed axle sleeve. Under torsional load, both the inner and outer components transmit the torsional load, wherein the inner component twists more than the outer component, resulting in relative displacement therebetween. The damping ring experiences the relative displacement and consequently damps energy of the twist, whereby powerhop and associated driveline disturbances, such as for example axle shutter, are reduced. | 08-06-2009 |
20090221376 | ROTARY OSCILLATION DAMPER - The invention relates to a rotary oscillation damper having an input part and an output part which can be moved relatively and to a limited extent with respect thereto against the influence of at least one energy store. The at least one energy store is in this case supported on one side on a counter bearing and on its other side acts on in each case at least one movement profile, which runs in the circumferential direction, of the input part and output part, in such a manner that, during a relative rotation of the input part and output part with respect to one another, the energy store absorbs energy, and emits it again when the relative rotation is reversed. | 09-03-2009 |
20090270189 | Dynamic Damper - A dynamic damper in which the inner diameter (D | 10-29-2009 |
20090325719 | Dynamic Damper - A dynamic damper, wherein flat surfaces approximately orthogonal to the axis of a drive shaft and facing each other are formed on the side walls of mass parts adjacent to each other. Where distances along the axial direction of the drive shaft between center points C bisecting the lateral dimensions D of the connection support parts and the gravity centers G of weights are A and the lateral dimensions of the mass parts having the weights and positioned parallel with the axis of the drive shaft are B, the distances A and the lateral dimensions B are set to fulfill the requirement of the relational expression A≦(B/3). | 12-31-2009 |
20100041485 | COMPOSITE TORQUE TRANSFER BODY AND SPLINE ASSEMBLY TO REDUCE JITTER IN AN IMAGE FORMING DEVICE - A composite torque transfer body and spline assembly includes a torque transfer component made of a first material and having a central body portion and a peripheral torque transfer portion integrally attached to and extending about the central body portion, a spline component made of a second material different from and having stiffness greater than that of the first material of the torque transfer component and also having an elongated tubular spline portion and a collar portion integrally attached to and extending about and radially outward from an end of the spline portion, and a plurality of elements on the central body portion of the torque transfer component and the collar portion of the spline component providing separate press-fitting and securing of the components to one another such that the components are mated and rotatable together about a central axis. | 02-18-2010 |
20100197415 | COUPLING WITH SLACK-TAKEUP, A ROTOR, AND A ROTARY WING AIRCRAFT - A coaxial rotary coupling ( | 08-05-2010 |
20100210370 | TELESCOPIC SHAFT FOR VEHICLE - Provided is a telescopic shaft. The telescopic shaft includes a male shaft including a plurality of first splines formed on an outer circumferential surface in an axial direction and a fixing groove and a derail prevention protrusion which are formed on outer circumferential surfaces at one end and a middle portion of the male shaft in a radius direction, a female shaft including a hollow and a plurality of second splines formed on an inner circumferential surface of the hollow corresponding to the plurality of first splines, a plurality of balls disposed between grooves of the plurality of first splines and grooves of the plurality of second splines, a leaf spring having a plate shape and inserted into the plurality of first spline grooves, and a fixing ring connected to the fixing groove and surrounding one end of the leaf spring to prevent the leaf spring from derailing. | 08-19-2010 |
20100234117 | BALANCED DRIVESHAFT ASSEMBLY AND METHOD - A balanced driveshaft assembly that includes a driveshaft and a composite weight. The driveshaft has a shaft member and a pair of cardan joints that are coupled to the opposite ends of the shaft member. The shaft member is formed of a first material. The composite weight is fixed to the shaft member, and includes an insert and a body. The insert is formed of a second material that is denser than the first material and is encapsulated in the body. The body is formed of the first material. A composite weight and a method for forming a balanced driveshaft assembly are also provided. | 09-16-2010 |
20100285892 | Tuned Mass Damper for Rotating Shafts - The invention relates to a vibration absorber for mounting onto the outer circumference of a rotating shaft or axis having an inner part ( | 11-11-2010 |
20100323804 | NESTED TORSIONAL DAMPER FOR AN ELECTRIC MACHINE - A damper for an electric machine ( | 12-23-2010 |
20110070957 | Tuned Absorber - A shaft assembly includes a shaft member having an inside surface and defined by an axis, an absorber assembly disposed within the shaft member and including a cantilever device spacing a mass member away from a base and including damping material disposed around the cantilever device. | 03-24-2011 |
20110077092 | Unbalance correction device of propeller shaft - The present invention provides a device for correcting an unbalance of a propeller shaft, specifically an unbalance correction device of a propeller shaft capable of securing a considerable amount of correction, reducing the generation of noise and the like, and preventing the adverse effect of welding heat caused by welding and fixing the balance weight from exerting on a vibration absorbing rubber member. The unbalance correction device of a propeller shaft is configured from a propeller shaft to which a damper is mounted, and a balance weight in which a primary weight plate part and an auxiliary weight plate part are formed continuously and integrally along a longitudinal direction, and a protruding piece is protrusively formed on a concave arced surface on a rear surface side of the primary weight plate part and from each corner part at four locations. The primary weight plate part is disposed in a non-mounted area of the damper at an axial direction end of the outer shaft with a longitudinal direction of the balance weight coinciding with an axial direction of the outer shaft, and the balance weight is configured such that only the protruding piece comes in contact with and is welded to an outer peripheral side face of the outer shaft. | 03-31-2011 |
20110118037 | Dynamic Damper - A dynamic damper which is reduced in weight and size without impairing the performance of the dynamic damper. A dynamic damper ( | 05-19-2011 |
20110159972 | DYNAMIC DAMPER FOR HOLLOW ROTATING SHAFT - In order to achieve downsizing, and to prevent a cleaning fluid from staying inside, a dynamic damper for a hollow rotating shaft is provided with a mass body floatingly inserted to an inner periphery of the hollow rotating shaft, of which a vibration is to be reduced, and an elastic body structured such that an inner diameter portion is fitly attached to an outer periphery of the mass body and an outer diameter portion is brought into pressure contact with an inner peripheral surface of the hollow rotating shaft, and made of a rubber-like elastic material, wherein grooves having both ends open to spaces at both sides in an axial direction of the elastic body are formed in one of fitted surfaces to each other of the mass body and the elastic body. | 06-30-2011 |
20110165951 | DUAL-TUNED VIBRATION DAMPER - A driveline with a shaft and a vibration damper coupled to the shaft. The damper includes a hub, a first mass, a first resilient coupling, a second mass, and a second resilient coupling. The first mass is disposed concentrically about the hub. The first resilient coupling resiliently couples the first mass to the hub. The first resilient coupling has a first spring constant. The second mass is disposed concentrically about the first mass. The second resilient coupling resiliently couples the second mass directly to the first mass. The second resilient coupling has a second spring constant that is less than the first spring constant. The first mass and the first resilient coupling are configured to attenuate vibration at a first frequency. The second mass and the second resilient coupling are configured to attenuate vibration at a second frequency. The second frequency is lower than the first frequency. | 07-07-2011 |
20110207538 | ROTATION SHAFT VIBRATION DAMPING MECHANISM - A vibration damping mechanism of a rotation shaft that is not likely to be subject to the limitation in layout and that is capable of stably maintaining damping properties by a frictional contact portion without variation for a long term is provided. The vibration damping mechanism includes a shaft for outputting torque inputted from its input side end portion to its output side end portion, and a damping member having a fixed portion fixed to the shaft and a frictional contact portion held in frictional contact with the shaft, in which the frictional contact portion is provided with a clamping band for urging the frictional contact portion toward the shaft to be held in frictional contact with the shaft at a predetermined contact pressure. | 08-25-2011 |
20110230270 | VEHICLE-USE PROPELLER SHAFT - The present invention provides a vehicle-use propeller shaft that includes a yoke having arm portions disposed at equal intervals in the circumferential direction, each arm portion extending outward in the radial direction, and that is capable of suppressing bending vibration. | 09-22-2011 |
20110269558 | DAMPER STRUCTURE AND ROTARY MACHINE - A damper structure of the present invention is provided on a shaft end ( | 11-03-2011 |
20110319177 | DAMPING SYSTEM AND METHOD FOR ELIMINATING TORSION VIBRATIONS - A damping system for damping torsion vibrations of shafts in machines is provided. A torque sensor detects torsion vibrations. At least one magnetostrictive actuator device creates a mechanical counter-vibration and a control device registers a measurement signal of the torque sensor in a time-resolved manner and creates a phase-shifted signal for a counter-vibration and drives the actuator device. Further, a method for eliminating torsion vibration of shafts in machines with such a damping system is provided. The torsion vibration of the torque of the shaft is registered in a time-resolved manner, a phase-shifted signal is created for a counter-vibration, and a mechanical counter-vibration is created using at least one magnetostrictive actuator device. | 12-29-2011 |
20120088590 | Rotary Shaft Flexural Vibration Damping Device - A damping device for damping flexural vibration of a shaft rotating about a first axis, the device having: a supporting body; and a member, which defines an annular opening fitted through with the shaft, and is movable, with respect to the supporting body and radially with respect to the first axis, between a first and a second position when the shaft flexes radially with respect to the first axis. The member is set to the first position, and the opening is traversed loosely by the shaft when the rotation speed of the shaft is within a first range; the member is set to the second position, and the opening cooperates with the shaft, when the rotation speed of the shaft is within a second range differing from the first range and including at least one critical speed of the shaft; and the damping device has elastic means interposed between the supporting body and the member. | 04-12-2012 |
20120094776 | APPARATUS COMPRISING A SHAFT AND A BALANCING SLEEVE - An apparatus including a shaft mounted for rotation and a balancing sleeve is provided. The balancing sleeve functions to balance the shaft during rotation and includes first and second ends. The first end is secured to the shaft so that the balancing sleeve is substantially concentric with the shaft and rotates with the shaft. The second end incorporates balancing weight to balance the shaft at lower speeds of rotation of the shaft where there is substantially no flexing of the shaft. The lengthwise stiffness of the balancing sleeve is matched to the lengthwise stiffness of the shaft to maintain balance of the shaft at higher speeds of rotation of the shaft where there is flexing of the shaft. | 04-19-2012 |
20120220384 | Breathing Mode Damper - A shaft assembly is provided to reduce breathing mode vibrations and resulting noises. The shaft assembly includes a shaft member having an outer surface and a damping member constructed at least in part from a damping material and including a substantially annular body and generally opposing ends. The opposing ends are biased such that at least a portion of the damping member engages with the shaft member. | 08-30-2012 |
20120252590 | ROTARY DAMPER - In a rotary damper including a shaft, a pair of side panels which pivotally support the shaft while allowing the shaft to rotate in the circumferential direction, a case which is held between the side panels and forms a pressure chamber therein, a vane which is provided in the shaft, has a distal end in sliding contact with the inner periphery of the case and divides the pressure chamber into a first chamber and a second chamber, and a side plate which is interposed between the vane and at least one of the side panels and are more excellent in abrasion resistance than the side panels. | 10-04-2012 |
20120252591 | METHOD, APPARATUS AND SYSTEM FOR REDUCING VIBRATION IN A ROTARY SYSTEM OF A WATERCRAFT - A method of reducing vibration in a rotary system ( | 10-04-2012 |
20130123029 | DEVICE FOR DAMPING VIBRATIONS IN A DRIVE TRAIN - A device for damping vibrations in a drive train, in particular for plug screws in the pulp and paper industries. The device is principally characterized in that a cylindrical shaft, preferably designed as a hollow shaft, is provided, wherein the cylindrical shaft is arranged between the halves of a coupling and at least one ring having friction surfaces is arranged around the cylindrical shaft. Stick-slip vibrations that occur can thereby be favorably eliminated, and thus the gearbox and the motor of the drive train can be protected. | 05-16-2013 |
20130210533 | TORSIONAL VIBRATION DAMPER - The disclosure relates to a torsional vibration damper for damping torsional vibrations of a shaft for industrial applications, including a damper hub having a rotational axis, a damper mass coaxial with the damper hub, and at least one elastomeric damping layer arranged between the damper hub and the damper mass. According to the disclosure, the damper hub and the damper mass are designed in such a way that an outer circumferential surface of the damper hub engages with an inner circumferential surface of the damper mass in a star-shaped manner in the radial direction with respect to the rotational axis, wherein the damper hub and the damper mass are supported against each other in the direction of the rotational axis of the torsional vibration damper by the elastomeric damping layer. | 08-15-2013 |
20140004964 | DEVICE FOR END-TO-END COUPLING OF A SUPERCRITICAL TRANSMISSION SHAFT, IN PARTICULAR FOR DRIVING A ROTORCRAFT ROTOR | 01-02-2014 |
20140315648 | MATERIAL COMPENSATION JOINT AND RADIAL VIBRATION DAMPER HAVING SAME - Mating components that are mateable to another component to share the same axis of rotation, assemblies including the mating component mated to another component, and methods of mating them together are disclosed. The mating component includes a hub having an engaging portion defining an endless channel recessed therein. The endless channel has a surface that defines one or more trenches therein and an elastomeric band seated against that surface in an uncompressed state. The elastomeric band has an outermost dimension relative to the endless channel that is larger than the inner or outer dimension defined by the engaging portion of the hub and thereby defines an unchanneled portion of the elastomeric band, which has a volume that is equal to or less than the total volume of the one or more trenches. | 10-23-2014 |
20140342841 | VISCOELASTIC DAMPENER - A propeller shaft assembly having a propeller shaft member defining an inner volume. A foam liner member is disposed in at least a portion of the inner volume of the propeller shaft member. The foam liner member is made of a viscoelastic, natural oil polyol-based foam, whereby the foam liner member is operable to reduce vibration amplitudes occurring within the propeller shaft member relative to an undampened propeller shaft member. | 11-20-2014 |
20150111652 | DAMPER FOR DRIVE SHAFT OF VEHICLE - A damper for a drive shaft of a vehicle, which is installed to a predetermined position of the drive shaft for transmitting torque of an engine to a driven wheel, may include a bimetal or a metallic member corresponding to the bimetal; and a hollow body molded of a rubber material to surround the bimetal or the metallic member. | 04-23-2015 |
20150119153 | Propshaft Assembly With Damper - A propshaft assembly that includes a tubular member, first and second end connections coupled to opposite ends of the tubular member and a damper that is received in the tubular member and positioned between the first and second end connections. The tubular member has a wall member that defines an interior circumferential surface. The damper has a first damping device, a second damping device and a third damping device. The first damping device has a first core and a first damping member that is fixed to the first core. The first damping member extends helically about the first core and engages the interior circumferential surface. The second damping device is formed of foam and is positioned in the tubular member between the first and third damping devices. The second damping device engages the interior circumferential surface. The third damping device has a second core and a second damping member that is fixed to the second core. The second damping member extends helically about the second core and engages the interior circumferential surface. | 04-30-2015 |
20150119154 | PROPELLER SHAFT - A propeller shaft for a vehicle includes a shaft having locking protrusions on an outer circumference, a tube having locking grooves on an inner circumference into which the shaft is inserted, the locking grooves engaging with the locking protrusions to form the spline coupling, a dynamic damper inside the tube to correspond to an end of the shaft and absorbing vibrations transmitted from a driving system, and a rubber stopper interposed between an outer circumference of the dynamic damper and the inner circumference of the tube to support the dynamic damper and correspond to the end of the shaft to limit sliding of the tube at normal times. The rubber stopper is broken by a pushing operation of the tube when an impact load greater than a collapse load of the rubber stopper acts on the rubber stopper, thereby permitting the sliding of the tube. | 04-30-2015 |
20150300449 | DAMPED PROPSHAFT ASSEMBLY AND METHOD FOR FABRICATING A DAMPED PROPSHAFT ASSEMBLY - A damped propshaft assembly with a hollow shaft and a tuned damper, which is received in the hollow shaft and includes a liner and a damping member. The liner's mass and stiffness are tuned to attenuate one or more of a bending mode vibration and a torsion mode vibration that occurs at a first predetermined frequency. The liner is not configured to substantially damp shell mode vibration that occurs at a frequency that is not equal to the first predetermined frequency. The damping member is coupled to the liner and is configured to primarily attenuate shell mode vibration in the hollow shaft at one or more desired frequencies. The tuned damper attenuates the at least one of the bending moment vibration and the torsion mode vibration at the first predetermined frequency and also attenuates shell mode vibration. A method for forming a damped propshaft assembly is also provided. | 10-22-2015 |
20150354622 | HYDROFORMED DRIVESHAFT TUBE WITH SECONDARY SHAPE - A hydroformed driveshaft tube formed using a hydroforming process is provided. The hydroformed driveshaft tube comprises a first end portion, a second end portion, and a middle portion. The middle portion is at least partially defined by a circular arc shaped surface of revolution. At least a portion of the middle portion has a diameter greater than a diameter of the first end portion and the second end portion. The middle portion comprises a first distension, a constriction, and a second distension and is formed between the first end portion and the second end portion. The constriction is formed between the first distension and the second distension and the middle portion affects a critical speed and a breathing mode frequency of the hydroformed driveshaft tube. The hydroformed driveshaft tube reduces a cost of a driveshaft assembly. | 12-10-2015 |
20150354623 | HYDROFORMED DRIVESHAFT TUBE WITH SECONDARY SHAPE - A hydroformed driveshaft tube formed using a hydroforming process is provided. The hydroformed driveshaft tube comprises a first end portion, a second end portion, and a middle portion. The middle portion is at least partially defined by a circular arc shaped surface of revolution. At least a portion of the middle portion has a diameter greater than a diameter of the first end portion and the second end portion. The middle portion comprises a first transition portion, a first constriction portion, a second constriction portion, and a second transition portion and is formed between the first end portion and the second end portion. The middle portion is formed between the first constriction portion and the second constriction portion and the middle portion affects a critical speed and a breathing mode frequency of the hydroformed driveshaft tube. The hydroformed driveshaft tube reduces a cost of a driveshaft assembly. | 12-10-2015 |
20160047436 | DAMPED PROPSHAFT ASSEMBLY AND TUNED DAMPER FOR A DAMPED PROPSHAFT ASSEMBLY - A damped propshaft assembly with a hollow shaft and a tuned damper, which is received in the hollow shaft and includes a liner and a damping member. The liner's mass and stiffness are tuned to attenuate one or more of a bending mode vibration and a torsion mode vibration that occurs at a first predetermined frequency. The liner is not configured to substantially damp shell mode vibration that occurs at a frequency that is not equal to the first predetermined frequency. The damping member is coupled to the liner and is configured to primarily attenuate shell mode vibration in the hollow shaft at one or more desired frequencies. The tuned damper attenuates the at least one of the bending moment vibration and the torsion mode vibration at the first predetermined frequency and also attenuates shell mode vibration. A method for forming a damped propshaft assembly is also provided. | 02-18-2016 |
20160200429 | DAMPING DEVICE FOR A SUPERCRITICAL TRANSMISSION SHAFT | 07-14-2016 |